EP0805735B1 - Method of regenerating blasting media for use in pressurized device - Google Patents

Method of regenerating blasting media for use in pressurized device Download PDF

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Publication number
EP0805735B1
EP0805735B1 EP94926541A EP94926541A EP0805735B1 EP 0805735 B1 EP0805735 B1 EP 0805735B1 EP 94926541 A EP94926541 A EP 94926541A EP 94926541 A EP94926541 A EP 94926541A EP 0805735 B1 EP0805735 B1 EP 0805735B1
Authority
EP
European Patent Office
Prior art keywords
blasting media
composite
composite blasting
media
carrier component
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94926541A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0805735A4 (enrdf_load_stackoverflow
EP0805735A1 (en
Inventor
Inc. Advanced Recyclable Media Systems
Wilfred Paul Parent
William R. Lynn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Matrix Surface Technologies Inc
Original Assignee
ADVANCED RECYCLABLE MEDIA SYSTEMS Inc
Parent Wilfred Paul
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ADVANCED RECYCLABLE MEDIA SYSTEMS Inc, Parent Wilfred Paul filed Critical ADVANCED RECYCLABLE MEDIA SYSTEMS Inc
Publication of EP0805735A4 publication Critical patent/EP0805735A4/xx
Publication of EP0805735A1 publication Critical patent/EP0805735A1/en
Application granted granted Critical
Publication of EP0805735B1 publication Critical patent/EP0805735B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
    • B24C9/006—Treatment of used abrasive material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Definitions

  • This invention relates to a method of remaking and/or regenerating media, for use in suitable blasting equipment, so that such remade and/or regenerated media may be again used in suitable blasting equipment and propelled, via a pressurized air stream, against a surface of an object to dislodge and/or absorb any contaminant thereon.
  • the contaminant or contaminants to be removed may include any foreign substance attached to or carried by the surface such as hazardous materials, soil, grease, oil, paint, soot, solvents and other objectionable deposits.
  • the invention also relates to a method of minimizing waste associated with removing contaminants or debris from a desired surface.
  • the present invention is particularly directed at remaking and/or regenerating media which is commonly referred to as "composite media" which comprises a plurality of discrete particles of an abrasive component mixed with and attached to a carrier component.
  • composite media which comprises a plurality of discrete particles of an abrasive component mixed with and attached to a carrier component.
  • the abrasive component and carrier component are selected to provide desired wear of the composite media, during use, to expose additional underlying abrasive media and to enhance cleaning of the surface being treated.
  • the composite media facilitates feeding of the blasting media and results in deeper penetration of the blasting media into the surface being treated.
  • a number of known blasting media compositions, which are particularly adapted for remaking and/or regenerating, are disclosed in United States Patent No. 5,234,470 issued August 10, 1993 to William R. Lynn and Wilfred P. Parent.
  • Yet another object of the invention is to provide a method of collecting, screening, sifting and/or separating of the used composite blasting media from the debris and other contaminants and to clean and recycle the composite blasting media to produce new granules of the composite blasting media which each contain additional abrasive component and/or carrier component.
  • a further object of the invention is to select the carrier component to be capable of physically carrying the abrasive component while controlling dust and prolonging the integrity of the abrasive component.
  • Still another object of the invention is to add a liquid or solid substance or a bacteria or fungus to the composite blasting media which will assist the composite blasting media in decomposing or decompose the absorbed contaminant and debris over a desired period of time.
  • the substance is typically added just prior to use.
  • the present invention relates to a method of recycling a used composite blasting media after being propelled through desired blasting equipment, said composite blasting media comprising a plurality of granules which each contain a plurality of discrete particles of an abrasive component physically interconnected with one another by a carrier component, which is a solid at room temperature,
  • the present invention further relates to a method of forming a recyclable granulated composite blasting media for use in treating a surface to remove undesired contaminants therefrom, said composite blasting media being suitable for being propelled via a fluid stream through desired blasting equipment;
  • the present invention further relates to a method of recycling a used composite blasting media after being propelled through desired blasting equipment, said composite blasting media comprising a plurality of granules which each contain a plurality of discrete particles of an abrasive component physically interconnected with one another by a carrier component, which is solid at a temperature below room temperature,
  • Suitable blasting equipment for propelling blasting media against a desired surface is shown in Figure 1.
  • the improved composite media 40 is supplied to and contained within a hopper 44.
  • An outlet of the hopper is connected with a positive feed mechanism 42 such as an auger driven by a motor 41.
  • the auger conveys the blasting media 40 through a one way valve 43 toward a T-fitting 45.
  • Pressurized air is supplied from air pressure source 46 to a second inlet of the T-fitting 45.
  • the pressurized air in the conveying blasting media combined with one another and are mixed and conveyed out an outlet of the T-fitting 45 toward the nozzle 47 for a discharge against a desired surface 48.
  • the regenerated composite blasting media according to the present invention is unique because the abrasive component is physically (mechanically, chemically, etc.) supported or held by the carrier component. Further, the carrier component can be selected to control the generation of dust and prolong the useful life, e.g. the integrity, etc., of the abrasive component as the carrier component can absorb much of the impact energy upon striking the surface being treated. As the media begins to wear, additional abrasive components are continually exposed. Once the carrier component has been sufficiently worn, i.e. after the blasting media 50 has been reused through the blasting equipment a sufficient amount of times (e.g.
  • the used blasting media is collected (step S1), by a suitable collection means 100.
  • a suitable collection means would, for example, be an operator sweeping the media particles into a pile and collecting the same with a dust pan or, preferably, using some sort of vacuum device to suck up all of the blasting media particles 50.
  • the media particles Once the media particles are collected (Figs. 2 and 3), they can be either screened or sifted (step S2) to separate the small particles, fines and other contaminates and debris 110 from the recyclable composite blasting media.
  • the screening step can be replaced or used in combination with a washing step (step S2A) to wash away and/or dissolve any matter that may be soluble in water or some other desired cleansing solution 112. If the washing step is employed, the washed composite blasting media is typically air dried or squeezed (step S2B) after the washing step to remove the residual liquid and/or moisture 114.
  • the cleaned composite blasting media is mixed (step S3) with at least one of additional abrasive component and/or carrier component to replenish the consumed, fractured, abraded and/or spent abrasive component and/or carrier component.
  • this mixture is typically heated (step S4) to a desired temperature, depending upon the composition of the carrier component, to melt the carrier component into liquid form and physically entrap, encapsulate and/or bond the added abrasive and/or carrier components with the recycled abrasive and carrier components.
  • the heated mixture of the composite blasting media is then thoroughly mixed to achieve a uniform mixture of the abrasive and the carrier components and allowed to solidify (step S5). Thereafter, the solidified composite blasting media is extruded (step S6) through suitable extruding equipment, such as an extruder manufactured by American Mapla Corp., 283 South Bypass, Mcpherson, Kansas.
  • the extruded composite blasting media is finally ground (step S7) by suitable grinding equipment, such as a grinder manufactured by Nelmor Plastic Machinery of Nuxbridge, Massachusetts (model #G1012M1), into a plurality of granules of a desired particle size, each granules comprising a plurality of abrasive components and carrier components physically interconnected with one another. The size of the granules is selected according to the blasting application for which the particles will be used.
  • the recycled composite blasting media is collected (step S1), screened or sifted (step S2), and, if desired, washed (step S2A) and dried (step S2B), and then additional abrasive component and/or carrier component may be is added to the cleaned composite blasting media (step S3), the same as with the previous embodiment. Thereafter, the mixture of the abrasive and carrier components is allowed to react and chemically bond with one another (step S4). The chemically bonded composite blasting media is then allowed to set or solidify (step S5), is extruded (step S6) by suitable extruding equipment, and finally ground (step S7) by suitable grinding equipment into granules of a desired particle size.
  • a foam is used as a carrier component of the composite media
  • water or another liquid may be added to and absorbed by the foam carrier component (step 1A) which will cause the foam carrier component to swell to a larger particle size (Fig. 3).
  • the swollen foam is much easier to separate in the screening or sifting step (step S2) as the contaminates and debris, such as lead paint which are either not soluable or readily soluable in water, readily pass through the screen or other sifting member while the swollen foam carrier component, of a sufficiently larger size, containing the abrasive component is readily retained.
  • the screened and swollen composite blasting media can then either be dried or squeezed, to remove the water or other cleaning fluid therefrom, before the composite blasting media is mixed with additional abrasive component and/or carrier component.
  • the composite blasting media comprises a slurry of water, or some other freezable liquid, and an abrasive component
  • the slurry is completely mixed and then frozen to solidify the mixture.
  • the frozen liquid can then be ground into a plurality of discrete particles each containing the carrier component (e.g. water) and the abrasive component.
  • the grinder is typically located in a room which is maintained at a temperature below the freezing temperature of water or another liquid used as the carrier component, e.g. 0°C, to minimize any melting of the frozen slurry.
  • the blasting will occur in a temperature controlled or a chilled environment (e.g. below 0° C). Such an environment will minimize any melting of the frozen liquid during use and to facilitate collection of the used blasting media, cleaning, and recycling of the blasting media.
  • a temperature controlled or a chilled environment e.g. below 0° C.
  • abrasive component into a pliable carrier component, such as a soft plastic (e.g. high density polyethylene; low density polyethylene; polypropylene; poly(vinyl chloride); polystyrene; ply(acrylonitrile-butadiene-styrene); and polyurethane), putty, etc.
  • a soft plastic e.g. high density polyethylene; low density polyethylene; polypropylene; poly(vinyl chloride); polystyrene; ply(acrylonitrile-butadiene-styrene); and polyurethane
  • putty etc.
  • the fines, the contaminates and the other debris is first separated from the reusable media and then additional abrasive and/or carrier component, e.g. soft plastic and putty material, is added to the collected mixture.
  • additional abrasive and/or carrier component e.g. soft plastic and putty material
  • an air washer to clean the collected blasting media (step S2).
  • One such suitable air washer is manufacturer by Invincible Air Flow Systems of Dover, Ohio (model no. 700-10). It is also possible, depending on the type of debris or abrasive material used, to use a magnetic separator to separate the fines, the debris and the contaminates from the recyclable composite media material.
  • a suitable magnetic separator is manufactured by Eriez Magnetics Inc. of Erie, Pennsylvania (model no. A magnetic rotor).
  • the recyclable composite blasting media according to the present invention is beneficial to the environment in general.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Solid Wastes (AREA)
  • Cleaning In General (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
EP94926541A 1994-08-17 1994-08-17 Method of regenerating blasting media for use in pressurized device Expired - Lifetime EP0805735B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1994/009411 WO1996005021A1 (en) 1994-08-17 1994-08-17 Method of regenerating media for use in pressurized device

Publications (3)

Publication Number Publication Date
EP0805735A4 EP0805735A4 (enrdf_load_stackoverflow) 1997-11-12
EP0805735A1 EP0805735A1 (en) 1997-11-12
EP0805735B1 true EP0805735B1 (en) 2000-03-29

Family

ID=22242881

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94926541A Expired - Lifetime EP0805735B1 (en) 1994-08-17 1994-08-17 Method of regenerating blasting media for use in pressurized device

Country Status (7)

Country Link
EP (1) EP0805735B1 (enrdf_load_stackoverflow)
JP (1) JPH11504268A (enrdf_load_stackoverflow)
KR (1) KR970705456A (enrdf_load_stackoverflow)
AT (1) ATE191167T1 (enrdf_load_stackoverflow)
AU (1) AU698838B2 (enrdf_load_stackoverflow)
DE (1) DE69423790T2 (enrdf_load_stackoverflow)
WO (1) WO1996005021A1 (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4555660B2 (ja) * 2004-10-27 2010-10-06 合資会社亀井鉄工所 砥材の再生装置及びその再生方法
JP5234478B2 (ja) * 2007-02-06 2013-07-10 株式会社日立プラントテクノロジー スポンジブラスト媒体の再生方法及びその装置
WO2018020975A1 (ja) * 2016-07-26 2018-02-01 新東工業株式会社 バレル研磨用の再生メディア及びバレル研磨用の再生メディアの製造方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2426072A (en) * 1945-07-17 1947-08-19 Du Pont Blast cleaning
US4827678A (en) * 1985-11-01 1989-05-09 Caber, Inc. Separation system for polymeric blast media
JPH0288175A (ja) * 1988-09-21 1990-03-28 Aron Kasei Co Ltd ショット材による洗浄法
US5146716A (en) * 1989-07-07 1992-09-15 Sponge-Jet, Inc. Pliant media blasting method
US5256703A (en) * 1989-07-07 1993-10-26 Sponge Jet Inc. Abrasive propellant for cleaning of surfaces and machinery
US5344472A (en) * 1991-09-12 1994-09-06 Lynn William R Method of recycling media for use in pressurized device
US5234470A (en) * 1992-02-28 1993-08-10 Lynn William R Media for use in pressurized device and method of farming
JPH05117635A (ja) * 1991-10-31 1993-05-14 O S G Kk ブラスト用研磨材
DE4214988C2 (de) * 1991-12-23 1993-11-25 Inventa Ag Wiederverwendbares Strahlmittel, Verfahren zur Herstellung desselben sowie Verwendung des Strahlmittels

Also Published As

Publication number Publication date
EP0805735A4 (enrdf_load_stackoverflow) 1997-11-12
KR970705456A (ko) 1997-10-09
WO1996005021A1 (en) 1996-02-22
JPH11504268A (ja) 1999-04-20
AU7634894A (en) 1996-03-07
DE69423790D1 (de) 2000-05-04
ATE191167T1 (de) 2000-04-15
EP0805735A1 (en) 1997-11-12
AU698838B2 (en) 1998-11-12
DE69423790T2 (de) 2000-11-23

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